Effects of initial crystallization process on piezoelectricity of PVDF-HFP films
-
Bin Hu
,
Liangke Wu
Abstract
The effects of some important factors in the initial crystallization process of the solution casting method on the piezoelectricity of poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) films were extensively explored. The experimental results revealed that there is an optimal initial crystallization temperature at around 90°C. The slow cooling speed can moderately enhance the degree of crystallinity. The most important finding was that a bilayer crystalline structure caused by an asymmetrical heating pattern can enhance the formation of packed micro-fibrillar morphologies after drawing. These three points can increase the piezoelectricity of the PVDF-HFP films, indicating the increase of the extended-chain crystals (β-phase).
Acknowledgments
This work is partly supported by the Research Funds from National Natural Science Foundation of China (No. 11372104) and Grant-in-Aid for Scientific Research (No. 26289319) from the Japanese Ministry of Education, Culture, Sports, Science and Technology to NH and HF.
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©2015 by De Gruyter
Artikel in diesem Heft
- Frontmatter
- Original articles
- Physico-mechanical characterization and biodegradability behavior of polypropylene/poly(L-lactide) polymer blends
- Tensile properties of polyformaldehyde blends and nanocomposites
- Interaction simulation and experimental physico-mechanical analysis of distinct polarity blends of polyethylene and polyvinyl alcohol
- Thermal degradation of high-density polyethylene/soya spent powder blends
- Combination of montmorillonite and a Schiff-base polyphosphate ester to improve the flame retardancy of ethylene-vinyl acetate copolymer
- Effects of initial crystallization process on piezoelectricity of PVDF-HFP films
- Characteristics of natural leather finished with some ecofriendly mixtures of polymeric aqueous dispersions
- Dye wastewater treatment by direct contact membrane distillation using polyvinylidene fluoride hollow fiber membranes
- The effect of pressure variations on the formation of gas inclusions in the rotational molding process
- Numerical study of filling strategies in vacuum assisted resin transfer molding process
- Effect of gas counter pressure on the carbon fiber orientation and the associated electrical conductivities in injection molded polymer composites
Artikel in diesem Heft
- Frontmatter
- Original articles
- Physico-mechanical characterization and biodegradability behavior of polypropylene/poly(L-lactide) polymer blends
- Tensile properties of polyformaldehyde blends and nanocomposites
- Interaction simulation and experimental physico-mechanical analysis of distinct polarity blends of polyethylene and polyvinyl alcohol
- Thermal degradation of high-density polyethylene/soya spent powder blends
- Combination of montmorillonite and a Schiff-base polyphosphate ester to improve the flame retardancy of ethylene-vinyl acetate copolymer
- Effects of initial crystallization process on piezoelectricity of PVDF-HFP films
- Characteristics of natural leather finished with some ecofriendly mixtures of polymeric aqueous dispersions
- Dye wastewater treatment by direct contact membrane distillation using polyvinylidene fluoride hollow fiber membranes
- The effect of pressure variations on the formation of gas inclusions in the rotational molding process
- Numerical study of filling strategies in vacuum assisted resin transfer molding process
- Effect of gas counter pressure on the carbon fiber orientation and the associated electrical conductivities in injection molded polymer composites
